baber/WOPTO huggingface dataset:
Patent KR-19990086769-A (KR)
Title: 차량의 연료이송장치
IPC: F02M55/02
Filed: 1998-05-29
Abstract: 본 발명은 차량의 연료이송장치에 관한 것으로, 특히 연료레일과 연료이송파이프의 연결구조를 개선시켜 조립부품수를 줄이고, 별도의 코팅공정이 필요 없이도 연료의 누설을 방지함과 동시에 조립생산성을 향상시킬 수 있도록 한 차량의 연료이송장치에 관한 것으로, 내부에 엔진내로 연료를 분사시키는 다수개의 인젝터(5)로 연료를 공급하기 위한 연료공급구멍(10A)과, 이 연료공급구멍(10A)의 일측에 이와 연통하는 끼워맞춤구멍(10B) 및 연료이송파이프 연결구멍(10C)을 구비한 연료레일(10)과; 
     상기 연료레일(10)의 끼워맞춤구멍(10B)내에 연료의 누설을 방지하기 위해 설치된 플러그(50)와; 
     상기 연료레일(10)의 연료이송파이프 연결구멍(10A)에 접속된 연료이송파이프(30)로 구성한 것을 특징으로 한다.
Patent KR-20000001275-A (KR)
Title: Message transmission/receiving method
Inventor: KIM HYEONG CHAN
IPC: H04L12/28
Filed: 1998-06-10
Abstract: PURPOSE: A system for transmitting/receiving E-mail through a network such as internet performs a telephone communication function and a pager call function through the network such as internet. CONSTITUTION: A message transmission/receiving method determines whether or not a call information such as a telephone number and a pager number is included in a predetermined area of the mail received in a mail server, and provides a call information to a switching system connected to a telephone network. The switching system transmits the mail to a terminal corresponding to the call information. Accordingly, in E-mail transmission using internet network, there is no need to additionally construct a call number field for a pager call. As a result, without changing a protocol, a pager call is possible.
Patent KR-20000002118-A (KR)
Title: Hydrogenation of carbon dioxide, hydroformylation, carboalkoxylation and carboxylation of olefin with using rhodium catalyst/salt cocatalyst system
Inventor: EOM SEONG JIN
IPC: C07C47/02
Filed: 1998-06-17
Abstract: PURPOSE: The reactivity, selectivity and stability of rhodium catalyst in reaction of rhodium-based catalyst were improved by using salt as cocatalyst of rhodium. CONSTITUTION: The manufacturing method of aldehyde, alkylester or carboxylic acid by hydroformylation, carboalkoxylation or carboxylation of olefin and also formic acid, methyl formate, methanol, and ethanol by hydrogenation of carbon dioxide in the presence of rhodium catalyst system containing salt as cocatalyst was developed.
Patent KR-20000002556-A (KR)
Title: Telephone
Inventor: KIM SANG HYUK
IPC: H04M1/65
Filed: 1998-06-22
Abstract: PURPOSE: A telephone is provided to exclude the interference while talking over the fixed telephone and the mobile phone. CONSTITUTION: The telephone comprises: a control device of a lock-removal for a mobile device to transmit the signal of the lock-removal equipped inside a fixed telephone(100); a control device of a lock-removal for the fixed device to transmit the signal of the lock-removal equipped inside the mobile phone(200); a lock-removing device for the fixed device to remove the locking state through the driving of a locking device of the fixed telephone; a lock-removing device for the mobile device to remove the locking state through the driving of a locking device of the mobile device.
Patent KR-19990013786-A (KR)
Title: 관상용 인조식물
IPC: A41G1/00
Filed: 1998-07-11
Abstract: (과제) 
     마루면등에 부설되는 매트상 유니트에 형성한 감상용 인조식물을 제공한다. 
     (해결수단) 
     녹색 합성수지부재로 격자상 그물눈구조(1a)를 갖는 소정면적의 심어설치용 기대(1)를 형성하고, 이 심어설치용 기대(1)의 그물눈 교차점 위치에 적당히 착색한 꽃부(2)와 녹색 줄기부(3) 및 잎부(4) 등으로 이루어진 합성수지제 조화체(5)를 일체로 심어설치하거나 또는 합성수지제 조화체(5)를 착탈자재로 심어설치하고, 전체로서 조밀한 조화체(5)를 구비한 의사화단유니트(6)를 구성하는 것이다.
Patent KR-20000009618-A (KR)
Title: Core of transformer
Inventor: CHO YOUNG WON
IPC: H01F3/00
Filed: 1998-07-27
Abstract: PURPOSE: A core of transformer is provided to reduce weight and volume of the core with a same magnetic flux density. CONSTITUTION: Disclosed is a core of transformer comprising E and I components(50, 60). The E component(50) includes a base(52), bobbins, an insertion axis(54) and a window frame(56). A bobbin where input coil is winded and the other bobbin where input coil is winded are inserted into the insertion axis(54). The I component(60) is fixed in the E component(50) so that the bobbins are not seceded from the insertion axis(54). Here, a width ratio of the insertion axis(54) and window frame(56) is between 3.0:0.85 and 2.3:0.5. Thereby, the cross sectional width of the window frame(56) can be reduced with same magnetic flux density.
Patent KR-19990014315-A (KR)
Title: 진동 회전 센서 전자장치내 정량화잡음을 줄이기 위한 제어 방법 및 그 장치
IPC: G01C19/5691
Filed: 1998-07-31
Abstract: 전체 각 모드로 동작하는 반구형상의 진동부재 자이로 타입(HRG)의 진동 회전 센서에서, 정상파 컴포넌트들이 패턴 각 측정을 제공하도록 하며, 디지탈 신호 처리기가 디지탈/아날로그 변환기출력신호를 제어하도록 작용하여 높게 증폭된 아날로그/디지탈 입력신호, 상기 패턴 각과 여자 각사이의 차이를 아날로그/디지탈 변환기 윈도우내로 유지시키도록 한다. 상기 아날로그/디지탈 변환기 윈도우가 디지탈/아날로그 변환기의 이산 레벨 n배로 세트된다. 상기 디지탈 신호 처리기내 한 디지탈 피이드백 루우프가 상기 트랙킹 각을 교정하여 상기 여자 전압을 제어하도록 한다.
Patent KR-20000014357-A (KR)
Title: City type cars navigation system
Inventor: JEONG DO HYONG
IPC: G08G1/0969
Filed: 1998-08-20
Abstract: PURPOSE: A city type cars navigation system is provided, which decreases an error of a satellite signal by an interference and a reflection in a city which building are closed up. CONSTITUTION: The city type cars navigation system comprises: a multi-antenna satellite signal receiving unit (22) for receiving a satellite signal from a GPS satellite through a plurality of antenna and computing a pseudo distance measuring value and a carrier phase measuring value; a navigation sensor unit for sensing a rotation angle and velocity of a traveling car to output the sensed value as a navigation sensor information; a measuring value error detecting unit (24) for only outputting a remaining pseudo distance measuring value and a carrier phase measuring value; a navigation computing unit (14) for computing a traveling information of a car; and a control unit (16) for reading a map information in a map data storage unit. Thereby, it is possible to decrease a lever arm effect and detect an error when a car is rotated in the center of other axis.
Patent KR-20000015310-A (KR)
Title: Shutdown latch circuit
Inventor: RYU YOUNG GI
IPC: H03K17/22
Filed: 1998-08-28
Abstract: PURPOSE: A showdown latch circuit is provided to prevent a power consumption at a standby mode by making the latch circuit not consume a power at the standby mode of the system. CONSTITUTION: A shutdown latch circuit comprises a comparison part(10) and a self bias circuit(20) which is composed of a bias part(21) and an error preventing part(22). The comparison part(10) uses a reference voltage as an operation power supply voltage, and detects whether a system error signal is inputted, to output a signal corresponding to the detection result. The self bias circuit(20) receives the reference voltage and a power supply voltage, and output a signal for shutting down the system continuously according to a signal outputted at a system error among signals outputted from the comparison part. The bias part(21) receives the system error signal from the comparison part to output a signal for forcing the system to be shut down according to the system error. The error preventing part(22) prevents a shutdown signal from being outputted by an abnormal operation of a circuit element at a system standby mode.
Patent KR-19990030284-A (KR)
Title: 통신 방법 및 통신 장치
IPC: G06F13/00
Filed: 1998-09-30
Abstract: 본 발명에 따른 통신 방법 및 통신 장치는 논리 통신 채널의 전송하는 말단점(transmitting end point)의 식별자를 나타내는 데이터, 논리 통신 채널의 수신하는 말단점(receiving end point)의 식별자를 나타내는 데이터, 논리 통신 채널의 전송하는 말단점의 식별자에 대응하는 주소를 나타내는 데이터, 논리 통신 채널의 수신하는 말단점의 식별자에 대응하는 주소를 나타내는 데이터, 논리 통신 채널의 전송하는 말단점의 주소에 대응하는 IP 주소를 나타내는 데이터, 및 논리 통신 채널의 수신하는 말단점의 주소에 대응하는 IP 주소를 나타내는 데이터를 적어도 포함하는 헤더를 갖는 패킷을 발생할 수 있으며, 이와 같이 하여 발생된 패킷을 전송할 수 있다.  본 발명의 구성에 따라 초기에 설정된 논리 통신 채널은 변경되지 않고 그대로 있을 수 있으며 컴퓨팅 실체가 한 컴퓨터에서 다른 컴퓨터로 이동되거나, 컴퓨팅 실체가 있는 컴퓨터가 망 내에서 재배치되더라도 사용될 수 있다.
Patent KR-20000021875-A (KR)
Title: Method for selecting channels of satellite broadcasting receiver
Inventor: KWAK CHANG MIN
IPC: H04N5/50
Filed: 1998-09-30
Abstract: PURPOSE: A method for selecting channels of a satellite broadcasting receiver is provided to select a channel for wishing, by manipulating a corresponding number. CONSTITUTION: A method for selecting channels of a satellite broadcasting receiver comprises the steps of: setting in hundredth units, tenth units, by reverse order of applied order, when number key signals for being consecutively applied within the preset standby time are applied, after a first key signal is applied while broadcasting a predetermined channel, and changing to a channel corresponding to a set number; and setting a figure to zero when the next key signal is not applied within the preset standby time, after the first key signal or a second key signal is applied, and replacing the set zero to the applied number key signal during the correction standby time, when the number key signal is applied within the preset correction standby time.
Patent KR-20000025365-A (KR)
Title: Device for controlling heater of ink cartridge
Inventor: JEONG YOUNG DO
IPC: B41J2/07
Filed: 1998-10-10
Abstract: PURPOSE: A control device for printing is provided to improve the printing quality by directly detecting the temperature of ink jetting unit inside an ink cartridge and by outputting a control signal in a substrate heater to control the temperature inside an appropriate range. CONSTITUTION: A control device for printing comprises of: a CPU(10) to output a control signal of printing according to printing data fed from a computer; a substrate heater(21) to vary the temperature of a jetting unit of ink; a temperature sensing unit(22); a signal converting unit(30) to convert a value of resistance output in the temperature sensing unit to a value of voltage; and a comparing unit to compare the value of voltage output from the converting unit of signal with a previously predetermined reference value. The signal converting unit outputs the value of resistance detected in the temperature sensing unit by converting to the value of voltage, and the signal of voltage output by converting is compared with the standard value predetermined by feeding to a non-converted terminal(+) of a first comparator(41) and a non-converted terminal(+) of a second comparator(42).
Patent KR-19990044856-A (KR)
Title: 귀금속 산화물의 제조방법 및 이를 사용하여 제조된 구조물
IPC: H01L27/108
Filed: 1998-10-14
Abstract: 본 발명은 귀금속 기판의 표면을 산소 함유 에너지 공급원에 노출시킴으로써 귀금속 기판상에 귀금속 산화물 필름층을 제조하는 방법에 관한 것이다.  산소-함유 에너지 공급원은 별도로 제어가능한 기판 바이어스를 사용하거나 사용하지 않으면서, 고밀도 플라즈마, 마이크로파 플라즈마, RF 플라즈마 및 산소-함유 이온 빔에 의해 생성된 이온 충격 및 이의 조합으로 이루어진 군으로부터 선택될 수 있다.  귀금속은 Pt, Ir, Ag, Au, Ru, Pd, Os 및 Rh로 이루어진 군으로부터 선택된 1종 이상일 수 있다.  귀금속은 또한 상기 귀금속중 1종 이상을 함유하는 귀금속 합금으로서 형성될 수 있다.  본 발명은 또한 귀금속 기판의 표면을 산소-함유 플라즈마에 노출시킴으로써 형성된 귀금속 산화물 필름층을 개시하고 있다.  형성된 산화물-함유 필름층은 다양한 처리 조건에 따라 다소 더욱 얇거나 더욱 두꺼울 수도 있으나 일반적으로 약 0.4 내지 10 nm의 두께를 갖는다.  본 발명은 또한 귀금속 기판의 상부 표면을 계면-보강층이 형성될 때까지 충분한 시간 동안 산소-함유 에너지 공급원에 노출시킨 후 고유전율 물질을 귀금속 기판의 상부상에 침착시킴으로써 ― 산소-함유층은 귀금속 기판과 고유전율 물질층 사이에 삽입된다 ―, 고유전율 물질을 귀금속 기판상에 침착시키는 신규한 방법에 관한 것이다.  본 발명은 또한 제 1 귀금속 물질로 형성된 제 1 전극의 상부 표면을 계면-보강층이 형성되기에 충분한 시간 동안 산소-함유 에너지 공급원에 노출시킨 후 상기 제 1 전극의 상부상에 고유전율 물질을 침착시킴으로써 ― 계면-보강층은 제 1 전극과 고유전율 물질층 사이에 삽입된다 ―, DRAM 캐패시터를 제조하는 신규한 방법에 관한 것이다.  이어서 최종 전극을 제 2 귀금속 물질을 사용하여 고유전율 유전 물질층의 상부상에 형성한다.  캐패시터를 제 1 전극과의 전기적인 연통을 위해 전도성 접촉 플러그가 형성되어 있는 전처리된 반도체 기판상에 형성한다.
Patent KR-20000026892-A (KR)
Title: Management system for gas feeding state
Inventor: CHOI BYEONG KUK
IPC: F17D3/00
Filed: 1998-10-23
Abstract: PURPOSE: A management system for a gas feeding state is provided to transmit a large amount of data by connecting a programmable logic controller(PLC) with supplementary facilities such as a multi-leak detector and the like in a serial communication line method. CONSTITUTION: A master PLC is connected with a touch panel(16) through a local network(N2) and the touch panel has a local PLC(14) for managing the gas leak state and a button for controlling. The local PLC is connected with a multi-leak detector(18) through a single line to transmit serial signals. The multi-leak detector detects the leakage gas in the relevant position through a teflon tube(22) connected to sixteen sensing points(24) respectively. The leak detector(18) is sequentially constituted of a valve(26) for controlling the introduction of the leakage gas detected from the teflon tube, an analyzer(28) and a recorder(30).
Patent KR-20000032385-A (KR)
Title: Mold for forming compartment for plasma display panel
Inventor: KIM BONG HYANG
IPC: H01J9/24
Filed: 1998-11-14
Abstract: PURPOSE: A mold for forming a compartment for a plasma display panel is provided to mold a compartment on a rear board with more accuracy, to produce the mold more quickly, and to make the maintenance easier. CONSTITUTION: A mold for forming a compartment for a plasma display panel includes a bottom-mold(50) and a top-mold(60). A rear board and a paste for forming the compartment are dropped on the bottom-mold(50). The top-mold(60) presses the rear board and the paste to form a compartment on the rear board. A plurality of cells(65) are glued together stationary in a long rod form to form the compartment.
Patent KR-20000032540-A (KR)
Title: Device for compensating of vehicle height
Inventor: GEUM PIL JUN
IPC: B60G11/00
Filed: 1998-11-16
Abstract: PURPOSE: A compensating device is provided to compensate a vehicle height sunken by a loaded burden by expanding an air storage tub placed between a body and a wheel shaft by the up and down vibration flowed in a vehicle body. CONSTITUTION: When a vehicle height is over a certain height, a pressing part(4) of a body(1) is contacted with a contact part(8) of a piston rod(6) and the air is not flowed in an air storage tub(13) since. However, since the body is sunken by many burdens in a vehicle, the pressing part is continuously contacted with the contact part and then the piston rod reciprocally moves. Herein, two check valves(10,11) are connected to an air inflow hole(9) and an air discharge hole(12) formed on both ends of a cylinder(5) in the opposite directions. Accordingly, when the piston rod reciprocally moves, the air flowed in from the air inflow hole is supplied to the air storage tub through the air discharge hole. Thereby, the air pressure is formed by a lot of air in the air storage tub, a sliding cap(14) raises the body and the vehicle height is raised.
Patent KR-20000033130-A (KR)
Title: Device for removing time delay of gain control channel in optical amplifier in wavelength division multiplexing network
Inventor: NA KI WOON
IPC: G02B6/02
Filed: 1998-11-19
Abstract: PURPOSE: A device for removing time delay of a gain control channel in an optical amplifier is provided to prevent cross gain modulation in a channel add/drop period in a wavelength division multiplexing(WDM) network. CONSTITUTION: A.device for removing time delay of a gain control channel in an optical amplifier in the WDM network comprises a drop coupler(C1) for dropping an information optical signal in a specific ratio, and forming an information channel and a first control channel; a control circuit(430) for measuring a first control channel signal from the drop coupler(C1), and outputting a signal for compensating for a variation amount of the information signal through a second control channel; an add coupler(C2) for adding the information channel signal and a compensation control optical signal from the second control channel, and providing it to the optical amplifier(400); and an optical fiber delay line(450) connected between the add and drop couplers, for forming the information channel.
Patent KR-20000033317-A (KR)
Title: Apparatus for automatic centering for liquid crystal display and method thereof
Inventor: HOE SU HAN
IPC: G09G3/36
Filed: 1998-11-23
Abstract: PURPOSE: An apparatus for automatic centering for liquid crystal display and method thereof are provided to make simply and easily automatic centering by adding a pattern capable of automatic-centering in the inside of system. CONSTITUTION: A method for automatic-centering for liquid crystal display comprises the steps of: reading the R,G,B from the establishment coordinate of LCD screen; reading R,G,B of each coordinate while shifting from establishment coordinate to a first direction; detecting a first spot of the coordinate, or the highest points of R, G, B; reading a second spot of the coordinate, or the lowest points of R, G, B while shifting from the first spot to the first direction; and judging the position of main clock from horizontal synchronizing signal of the position and rising edge of above-mentioned horizontal synchronizing signal and deciding starting point of the coordinate for automatic centering; making the valid data signal from the above applied.
Patent KR-20000038387-A (KR)
Title: Method for forming virtual path for pin test of fpga
Inventor: SIM SEUNG PHIL
IPC: G06F9/455
Filed: 1998-12-07
Abstract: PURPOSE: A virtual path forming method is provided to reduce the number of sockets for a pin test and save the expenses by forming a virtual path between FPGA chips not connected to an interface socket. CONSTITUTION: An FPGA array(200) is constituted with plural FPGA chips(FPGA0, FPGA1, FPGA2, FPGA3, FPGA4, FPGA5). The FPGA chips and the host(100) are interconnected by the interface part(220). The interface part(220) is connected to the host(100) to transmit n data bits simultaneously. Connection paths(a, b, c, d, e) are formed between blocks mapped on the respective FPGA chips according to a design circuit downloaded from the host(100). The connection paths(a, d) of the respective connection paths are connected to pins(t1, t2) of the pins of the interface socket(220), respectively.
Patent KR-20000038719-A (KR)
Title: High-fluid and high-impact thermoplastic resin composition
Inventor: SEO KYUNG HOON
IPC: C08L51/00
Filed: 1998-12-08
Abstract: PURPOSE: A thermoplastic resin composition is provided which has high fluid & high impact and can be used for raw materials of portable electronic machinery, and a precision part of a car. CONSTITUTION: A thermoplastic resin comprises 25-99 pts.wt. of a poly(1,4-butylene terephthalate) resin having an intrinsic viscosity of 0.90 or more, 1-75 pts.wt. of a polycarbonate having an intrinsic viscosity of 0.35 or less, 5-30 pts.wt. of a copolymer forming a core-shell prepared by grafting at least one monomer selected from the group consisting of methylmetacrylate, styrene, and acrylonitrile onto at least one polymerized rubber selected from the group consisting of a diene rubber having C4-C6, an acrylate rubber, and a silicon rubber, wherein the content of the rubber is 20-90 pts.wt.
Patent KR-20000040795-A (KR)
Title: Apparatus for connecting a focus volume substrate of a flyback transformer
Inventor: LIM GI CHEON
IPC: H01F38/42
Filed: 1998-12-19
Abstract: PURPOSE: An apparatus for connecting a focus volume substrate of a flyback transformer is provided to easily connect the terminal portions of a volume substrate to a connecting terminal. CONSTITUTION: An apparatus for connecting a focus volume substrate of a flyback transformer comprises focus and screen volume substrates(120,130), a volume case(160), a volume connecting terminal(190), and a cover portion(220). A separation film(150) of the volume case(160) is inserted into an opening of the volume substrate(120,130). A connecting terminal engaging recess(180) is formed in the volume connecting terminal(190).
Patent KR-20000041971-A (KR)
Title: Wideband tuner receiving all band of television and satellite broadcasting
Inventor: CHO SAM YEOL
IPC: H04N5/44
Filed: 1998-12-24
Abstract: PURPOSE: A wideband tuner receiving all band of television and satellite broadcasting is provided to receive television and satellite broadcasting with one tuner. CONSTITUTION: A wideband tuner receiving all band of television and satellite broadcasting includes a low pass filter(100), an up converter2(00), a band pass filter(300), a down converter(400). The low pass filter(100) passes a frequency signal below 1450MHz. The up converter(200) mixes the output of the low pass filter with a first oscillation frequency to converts into an intermediate frequency. The band pass filter(300) pass a frequency signal in the range of 1800MHz ±12MHz. The down converter(400) mixes the output of the band pass filter with a second oscillation frequency to converts into an intermediate frequency. The up and down converters include a first transformer(230), an oscillator(240), a mixer(250), and a second transformer(260). The first transformer(230) generates two signals with a magnitude half of that of the input signal and the phase difference between the two signals is 180 degrees. The oscillator(240) generates oscillation frequency. The mixer(250) mixes the two outputs of the first transformer. The second transformer(260) receives the two outputs of the mixer and combines the signal to a signal of doubled magnitude.
Patent KR-20000045480-A (KR)
Title: Fabrication method of soi device
Inventor: AHN GWANG HO
IPC: H01L21/336
Filed: 1998-12-30
Abstract: PURPOSE: A fabrication method of SOI(Silicon On insulator) device is provided to realize DT-MOS device controllable threshold voltage in accordance with operational conditions without adding an area for connecting to a gate. CONSTITUTION: A fabrication method of SOI device comprises steps of: sequentially forming a gate insulation film and a first conductor on the SOI substrate on which a lower semiconductor substrate, an embedded insulation film and an upper semiconductor substrate are stacked; sequentially etching the first conductor, gate insulation and upper substrate through lithography and etching processes; forming a second conductor; sequentially etching the second conductor and first conductor through lithography and etching processes defining a portion to become as a gate; and forming a junction area.
Patent KR-20000045759-A (KR)
Title: Device of automatically removing tar of lpg vehicle
Inventor: JEONG SEUNG WON
IPC: F01N3/02
Filed: 1998-12-30
Abstract: PURPOSE: An automatic removal device of tar of an LPG(liquefied petroleum gas) vehicle is provided to improve efficiency of an engine by automatically discharging tar which is a nonvolatile material mixed in LPG fuel without depositing in a vaporizer and by improving the function of a vaporizer. CONSTITUTION: A LPG fuel is flowed into an engine by passing through a vaporizer(50) according to the driving of the engine. Tar(A) mixed in the LPG fuel is generated in the vaporizer and the tar is discharged via a discharge pipe(54a). The tar is stored in a storage tank(60) via a groove(56a) of a first sliding member(56) and another discharge pipe(54b). The pressure supplied via a pressure supply pipe(68) cannot overcome the tension force of a first spring(58) pressuring the first sliding member. Thus, the first sliding member is kept in the pressurized state by the tension force of the first spring. Herein a second sliding member(64) of a second body(62) prepared on the lower end of the storage tank is pushed by the tension of a second spring(66) and thus closed by the face without a groove(64a) of the second sliding member. If the engine stops, the tar stored in the storage tank is discharged along the groove of the second sliding member.
Patent KR-20000047253-A (KR)
Title: Reservation channel allotment method in satellite communication system
Inventor: CHOI GYUNG SU
IPC: H04W72/04
Filed: 1998-12-31
Abstract: PURPOSE: A reservation channel allotment method in satellite communication system is provided to allot a reservation channel to a good subscriber to give a priority to an access request to him, thereby enhancing the reliability of communication service. CONSTITUTION: A reservation channel allotment method in satellite communication system comprises: a reservation channel storage step receiving a reservation channel from a central station to store it in a set top box; an access request performing step according to call access request from a subscriber; a call access decision step according to the access request; a call access failure times decision step informing the subscriber of a call access failure and deciding the times of the call failure if the call access is failed; an access request re-performing step reading the reservation channel to re-perform the call access request; and a service request performing step performing a service request to the central station if the call access is set.